FICM voltages during driving - Ford Powerstroke Diesel Forum

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post #1 of 3 Old 10-12-2013, 11:49 AM Thread Starter
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FICM voltages during driving

So today I was driving and watching the dashboss particularly the FICM Voltage, and I noticed that it would fluctuate from 46-48 volts, should I go ahead and have one on standby in the event that this one crashes or should I be okay with this voltage?

I have new batteries and a new alternator so the input voltage isnt a factor. I have dealt with for some time now a slight "miss" during cold running conditions which only lasts about 4-6 miles.

Stiction or FICM, would FICM replacement or repair, fix the slight miss on cold starts?

Any thoughts or suggestions...
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post #2 of 3 Old 10-12-2013, 11:55 AM
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Have you upgraded your batteries cables and cleaned your grounds down to bare metal?


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #3 of 3 Old 10-12-2013, 12:08 PM Thread Starter
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Quote:
Originally Posted by Term3 View Post
Have you upgraded your batteries cables and cleaned your grounds down to bare metal?


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I did not replace or upgrade the cables as the ones on there are in good shape, I did clean the grounds with wire brush. I am reading good input voltage 12.5 with switch off, and I think its around 15 when running. The only fluctuation I see is the FICM output voltage and it is constantly moving around between 46-48 volts.
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